Incandescent gas-lamp.



G. I. TENNEY.

INGANDESGENT GAS LAMP.

APPLIGATION FILED FEB.8, 1911.

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0. I. TENNEY. INGANDESGENT GAS LAMP. APPLICATION FILED l-EB.8, 1911.

Patented Feb. 3, 1914.

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G. I. TBNNEY.

INGANDESGBNT GAS LAMP.

APPLICATION FILED IEB.8, 1911.

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Inventor &y 6 I I I COLUMBIA PLANOGRAPH :04, WASHINGTON, u. C.

CHARLES I. TENNEY, OF DES MOINES, IOWA.

INCANDESCENT GAS-LAMP.

To all whom it may concern Be it known that I, CHARLES I. TENNEY, a citizen of the United States, residing at Des Moines, in the county of Polk and State of Iowa, have invented certain new and use.- ful Improvements in Incandescent Gas- Lamps, of which the following is a specification; 7

My objects are to provide a lamp of this kind of simple, durable and inexpensive construction in which both the air and the gas may be heated by the incandescent burners to a high degree at or before the time they are commingled and delivered to the burners to thereby provide for the ready consumption of the gas and air and to increase the heat as applied to. the incandescent mantles. i.

More specifically in this connection it is my object to provide ana-ir heating chamber located above the incandescent burners and provided with inlet openings at points below the incandescent burners s0 that the heat applied to the heating chamber will cause a natural draft of .air to flow into the heating chamber and out through the incandescent burners without danger or possibility of having the mixed gas and air within the heating chamber pass to the outside atmosphere through the intake openings of the heating chamber; and also to provide for a maximum flow of air in a strong and steady current into the heater above the incandescent mantles.

More specifically inthis connection it is my object to provide an improved form of heating chamber for air andan improved form of heating chamber for gas, the latter being arranged above the air heating chamber and further from the source of heat.

A further object is to provide an improved needle adjusting mechanism for the gas discharge opening into the pipe through which the comingled gas and air is supplied to the incandescent burners.

A further object is to provide a lamp of this kind in which the outer casing is thoroughly protected from the heat of the lamp by an interior chimney spaced apart from the casing so that the casing is protected from the heat to the end that the nickel plate or other ornamental finish of the outer casing will not be destroyed by the heat.

A further object is to provide a lamp of this kind in which the parts may be readily,

Specification of Letters Patent.

Application filed February 8, 1911.

Patented Feb. 3,1914. Serial No. 607,257.

quickly and easily assembled or detached for purposes of repair or replacement.

My invention consists in certain details,

in the construction, arrangement and comblnatlon of the various parts of the device, whereby the objects contemplated are at tamed, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which Figure 1 shows a side elevation of a gas lamp embodying my invention. Fig. 2 shows a vertical, central, sectional view through the body portion of my improved lamp. Fig. 3 shOWs a transverse, sectional view on the line 3-3 of Fig. 2. Fig. shows an enlarged, detail, vertical, sectional view illustrating the means foradjusting the needle valve. Fig. 5 shows a sectional view on the line 55 of Fig. 4.. Fig. 6 shows a side elevation of the detachable chimney, and Fig. 17 shows an enlarged, detail, sectional view illustrating one of the adjustable regulators for the air intake pipes.

Referring to the accompanying drawings, I have used the reference numeral 10 to indicate a gas supply pipe. At the lower end of the gas supply pipe is a gas heating chamber comprising a hollow circular body portion llhaving a flat horizontal bottom 12 and also having a tubular upright extension 13 at its top. This extension 13 is screwed on the lower end of the pipe 10. Arranged within this tubular extension is a sleeve 14 having a smooth central opening through which is extended a stem 15, the lower end of which is provided with a series of cog teeth 16 extending completely around it. This stem has a smooth exterior at the point where it extends through the collar 14 and it is provided with a gas passageway 17 open at its upper end and closed at its lower end, there being lateral gas passageways 18 formed in the stem to communicate with the passageway 17 and to discharge into the interior of the tubular extension 13 below the collar 14, as clearly illustrated in Fig. 4. Formed on or fixed to the lower end of the stem 15 is a needle valve 19 of ordinary construction.

To provide for raising. and lowering the stem 15, I have mounted in the side of the tubular extension 13 a rotary valve stem 20 extended through a stufling box 21 and provided with a pinion 22 at its inner end to mesh with the cog teeth 16 on the stem. At

the lower end of the gas heating chamber 11 is a tubular extension 23 screw threaded both internally and externally. Mounted in the tubular extension 23 is a cylindrical gas chamber 24 screw threaded on its exterior to coact with the threads on the interior of the extension 23 and having its upper end extended into the interior of the gas heating chamber 11. Gas inlet openings 25 are formed in the upper end of the chamber 24 and the lower end of said chamber is pro vided at its bottom with an outlet opening 26 to coact with the pointed end of the needle valve 19, whereby the flow of-gas through the gas chamber 24 may be accurately regulated, and adjusted. I also preferably provide in the gas heating chamber 11 a vertically arranged opening to receive a small tube 27 for a pilot light and said tube 27 is surrounded within the heating chamber 11 with a circular wall 28 which forms a guide and support for the gas tube 27. The upper end of this gas tube 27 is provided with a slip joint of ordinary construction at 28. The end of the tube 27, above the slip joint, is screwed into and permanently connected with the supply pipe 10 above the regulating valve 29 in the supply pipe 10 for controlling the passage of gas into the lower end of the supply pipe 10. At the lower end of the tube 27 is a small burner 30 for a pilot light. The arrangement of these parts is such that the various parts of the lamp may be assembled first and then after they are assembled, the tube 27 may be extended vertically through the lamp and connected to the slip joint 27.

I have provided for supplying heated air to the lamp as follows: The air heating chamber comprises a cylindrical body portion 31 screwed to the extension 23 of the gas heating chamber. The lower end of the said cylindrical central portion of the air heater is provided with an internally screw threaded extension into which is screwed a pipe 32 which has at its lower end a number of branch pipes 33, each of which has at its lower end a supporting collar 34 for an inverted gas mantle. These supporting collars are of the ordinary construction and inverted gas mantles are attached to them in the ordinary way; hence further detailed description thereof is deemed unnecessary herein. The said air heating chamber comprises in addition to the said cylindrical ody portion 31, a number of radially extended heating chambers 35 communicating with the central chamber and provided at their outer ends with cylindrical extensions 36, as shown in Figs. 2 and 3. These heating chambers 35 are preferably flat on their bottom portions and also preferably inclined from their outer ends upwardly toward the central chamber 31, as shown in Fig. 2. The said heating chambers 35 are also spaced apart, as clearly shown in Fig. 3, so that the heat may pass upwardly from the lamp between said chambers 35 to impinge upon the gas heating chamber 11 which is located above them. The gas discharge opening 26 is arranged near the lower portion of the central air heating chamber 31 and directly above the upper end of the pipe 32, as clearly indicated in Fig. 2. In each of the cylindrical ends 36 of the heating chambers 35, I have detachably mounted an air intake pipe 37, which pipe has a substantially horizontally arranged upper end to fit into the part 26 and its body portion is inclined downwardly and outwardly with its inlet or lower end arranged in a plane below the discharge ends of the pipes 33.

In order to provide for the regulation of the amount of air admitted into the intake pipes 37, and to prevent the entrance of dust, insects, etc., I have provided an adjustable thimble 38 closed at its lower end and having slots 39 in its sides. On the interior of the thimble is a screen 40 through which the air must pass to enter the pipe 37. Obviously by moving the thimble 38 into or out of the pipe 37 the size of the inlet openings in the thimble may be decreased or en-' larged to suit the requirements of use.

The casing of the lamp comprises a metal.

cylinder 41 open at both ends. Said cylinder may be ornamented in any desirable way and is preferably nickel plated on its exterior. At the bottom of the cylinder is a hinged rim 42 provided with a latch device 43 at one side and also provided with set screws 44 by which a globe 45 may be attached to the rim. The globe and rim may be jointly swung to positions for providv ing access tothe mantles.

In order to protect the casing 41 from the heat of the lamp, I provide a chimney composed of an upper and lower chimney section. The upper section 46 is made of sheet metal of cylindrical form and open at both ends and is of somewhat less diameter than the interior of the casing 41. It is provided with an opening 47 through which the rod 20 is passed and it is also provided with a number of notches 43 designed to receive the tubular ends 36 of the air heater, the weight of said upper section being supported upon the parts 36. The lower section 49 is also made of cylindrical shape and of sheet metal and the two sections are detachably connected with each other by means of a bayonet joint 50, as illustrated in Fig. 6. I

preferably provide at the top of the cas-' mg 40 a detachable screen 51 which may slide freely on the pipe 10. Above-the (res-Q various parts of my improved lamp may be readily quickly and easily assembled and any part may be readily and easily detached for purposes of repair or replacement. In this connection it is to be noted that the two-part chimney is of especial convenience for the reason that the lower part may first be detached and then access may be had to the air heating chamber. The upper part of the chimney may also be readily detached by swinging it laterally within the casing until the rod 20 is freed from the upper section of the chimney. When the lamp is burning the gas passes downwardly through the pipe 10 under pressure and enters the gas heating chamber 11 where it is subjected to the heat from the burners so that the gas is superheated before passing clownwardly into the pipe 32. By having the air heating chamber arranged below the gas heating chamber the said air heating chamber is subjected to much more intense heat than the gas heating chamber and the advantage of this arrangement is that the air to be heated is of much greater volume than the gas and the passage of the cool outside air into the air heating chamber causes the walls thereof to be kept relatively cool. Therefore by placing the air heating chamber nearer the lamp and in a place where the heat is more intense, I am enabled to heat the air to a high degree. By this arrangement it is obvious that when the heated air and the heated gas are discharged downwardly through the pipe 32 in proper proportions for perfect combustion the mixture is previously heated to such a high degree thatwhen combustion takes place the total amount of heat applied to the mantles is very intense and they are thereby maintained at a high degree of incandescence, and a large quantity of pure white light is radiated therefrom. a

One of the desirable features of my invention is the creation of a natural flow of air into the heater and from the heater into the burners without the assistance of the flow of gas under pressure. This I accomplish by having the inlet openings into the air heating chamber arranged in a plane below the outlet openings of the burners. When the air within the air heating chamber is subjected to the intense heat from the burners, it will expand to a very great extent and if the air inlet openings to the air heating chamber were above the burners there would be a tendency for the heated air to rise and pass out through said inlet openings and this would result in creating a natural draft up through the burners and through the air heater and out through the air inlet openings thereof. In some instances, this tendency for the air to pass out through the inlet openings of the air heater has resulted in the escape of a certain amount of gas from the lamp, for unless the air inlet openings are below the outlet openings, it might readily happen, and in many; in stances has happened, that the air and gas within the air heating chamber under certain conditions has flowed out through the inlet openings of the air heater which obviously is highly objectionable. Further by my improved arrangement the gas and air within the air heater are prevented from passing out through the air inlet openings because the natural How of the air, on account of gravity, will be through the highest outlet, and in my improvement the highest outlet is through gas burners. Furthermore, in this connection, the flow of gas under pressure into the interior of the air heating chamber creates an increased pressure within the air heating chamber and if the openings thereto intended for inlet openingswere arranged in a plane above the openings intended for outlet openings the gas could escape through the air inlet openings. However by having the air inlet openings below the discharge openings the escape of gas through the air inlet openings is prevented even though there is no heat being generated to be applied to the air heating chamber.

In connection with the use of. my improved lamp, I find that it is desirable, although not absolutely essential, to extend the inlet pipes of the air heater to a point below the outlet openings of the burner. The reason why this is not essential is that at all times when the lamp is in operation there is an injected current of gas under pressure forced down into the tube that leads to the burner which creates a partial'vacuum in said tube and which thereby induces a flow of air into the air heater. Therefore by taking this induced action of the gas under pressure into consideration there will be a flow of air into the air heater and the escape of gas from the air heater through the outlet openings thereof will be prevented even though the inlet openings of the air heater are at or slightly above the outlet openings of the burners. It is further de sirable in all lamps of this kind to have the inlet openings of the air heater extended downwardly to a point below the air heater.

Another highly advantageous feature of my invention is that by arranging the air and gas heating chambers in the manner illustrated and described, the lamp, when in operation, will supply such an amount of heat to the air heating chamber as to burn up dust, insects, or other foreign substances that may be introduced therein through the air supply pipe. It would not be practicable to apply as much heat to the gas heater as to the air heater for the reason that cool air is passing through the air heater in a large volume which tends to prevent the metal of which the air heater is formed from being burned. However in the gas heater there is a relatively small amount of gas passing through it and hence its walls are not cooled by the gas to any such extent as are the walls of the air heater.

The construction of my improved lamp is such that when in use heat will be applied to the gas heater to such an extent that it will burn up any solids or liquids that may be introduced into it through the gas supply pipe. In this connection, it is to be remembered that in many instances there is a tar-like liquid that accumulates within gas pipes and that is sometimes discharged through the outlet openings of the gas pipes. Lamps of this kind are frequently rendered inoperative on account of small quantities of such foreign matter being deposited into the needle valve thereof. By means of'my improvement any such liquid must be first discharged upon the fiat bottom of the gas heater and then when the lamp is burning this foreign matter will be burned up and will pass off with the gas without leaving any accumulation of foreign matter within the gas heater, thereby avoiding all possibility of having the needle valve clogged or rendered inoperative on account of such foreign matter.

I claim as my invention:

1. In a gas lamp, the combination of a burner, an air superheating chamber above the burner, a gas superheating chamber above the air superheating chamber, a chimney open at both ends and having both of said superheating chambers contained within it and designed to conduct the heat out from the burner so that it may directly imping'e upon both of the superheating chambers in its passage to the top of the chimney, and air supply pipes for the air superheating chamber communicating at one end with the air superheating chamber and extended outwardly through said chimney and then downwardly to a point adjacent to the burner, for the purposes stated.

2. An improved incandescent gas lamp, comprising a gas supply pipe, a gas superheating chamber in communication with the gas supply pipe, an air super-heating chamber below the gas superheating chamber and provided with vertically arranged passageways for heating, whereby the heat beneath the air super-heating chamber may pass through said vertically arranged openings and impinge directly upon the gas superheating chamber, a burner supply pipe communicating with the air super-heating chamber, means for discharging gas from the gas super-heating chamber into said burner supply pipe from a point within the air super-heating chamber, and a chimney open at its upper end and inclosing both of said super-heating chambers to thereby direct the heat to impinge directly upon both the said super-heating chambers before passing through the upper end of the chimney.

8. An improved incandescent gas lamp, comprising a gas supply pipe, an air superheating chamber having at its upper end a tubular bearing, a sleeve in the lower end of the gas super-heating chamberhaving openings in its sides above the bottom of the gas super-heating chamber and also having a discharge opening at its lower end, a pipe slidingly mounted in the bearing in the upper end of the gas super-heating chamber, a rod fixed to the lower end of said pipe and having a sliding bearing in the upper end of said sleeve, the lower end of said rod being pointed and designed to regulate the discharge opening in the lower end of said sleeve, said pipe being provided with an opening within the gas super-heating cham ber so that gas from the supply pipe may be discharged into the interior of the gas superheating chamber, means for vertically adjusting said pipe, and a burner supply pipe below the discharge end of said sleeve.

4:. An improved incandescent gas lamp, comprising a gas superheating chamber, an air superheating chamber below it and provided with vertically arranged passageways to permit the heat to impinge directly upon the gas superheating chamber, an air pipe extending outwardly from the air superheating chamber and a two part chimney surrounding both chambers, open at both ends, one part having notches for the air pipe and the other being telescopically and detachably connected with the notched part, said chimney being shaped to cause the heat to pass through the air superheater and to strike upon the gas superheater.

In a lamp, the combination of a burner, a supply pipe extending downwardly to the burner, an air heater communicating with the supply pipe and having a number of outwardy extended tubular projections having air inlet openings therein, an upper chimney section detachably mounted upon said tubular extensions, a lower chimney section detachably supported by the upper chimney section and a casing surrounding the chimney and spaced apart from it.

6. In a lamp, the combination of a gas supply pipe, a gas heater comprising a hollow body portion having an internally screw threaded cylindrical extension at its top, a collar screwed into said extension and having a smooth opening therein, a gas supply pipe being screwed into said extension above the collar, an internally screw threaded extension at the bottom of the gas heater, a needle valve rod extended through the opening in said collar, and being provided with a passageway communicating at its upper end with the interior of the gas supply pipe and at its lower end with the interior of the gas heater, cog teeth formed on said needle valve rod, an adjusting rod extended through the side of the gas heater, a pinion thereon in mesh with the teeth on the needle valve rod, a tube screwed into the opening at the bottom of the gas heater and having a discharge opening at its lower end to coact with the needle valve rod and also having openings at its upper end to communicate with the interior of the gas heater, for the purposes stated.

7. In a lamp, the combination of a gas supply pipe, a gas heater comprising a hollow body portion having an internally screw threaded cylindrical extension at its top, a collar screwed into said extension and having a smooth opening therein, a gas supply pipe being screwed into said extension above the collar, an internally screw threaded extension at the bottom of the gas heater, a needle valve rod extended through the opening in said collar and being provided with a passageway communicating at its upper end with the interior of the gas pipe and at its lower end with the interior of the gas heater,

ing at its lower end to coact with the needle valve rod and also having openings at its upper end to communicate wit-h the interior of the gas heater, an air heater, comprising a hollow central body portion screwed to the extension at the lower end of the gas heater and also provided with a series of radially extended hollow body portions having air inlet openings at their outer end, the discharge opening of said needle valve device being arranged within said air heater, and a burner supply pipe screwed into the lower end of the air heater, for the purposes stated.

Des Moines, Iowa, February 3, 1911.

CHARLES I. TENNEY.

\Vitnesses:

MARY WVALLAOE, W. P. BAIR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

